Had an Eris for about a week. Loved it but could not work with the keyboard. So traded it in for the Moto Droid over the weekend. Love it more. Even though I really wanted the physical qwerty I have not even used it. The bigger screen and virtual qwerty works alot better for me. There are a few things I did like better with the Eris and a few that I really don't like about the Moto but I will manage. And the Moto just feels better in my hands. The Eris was a little dainty for me. I don't carry my phones in my pocket so the bigger size id not a big deal. I'm not knocking the Eris at all. It is a great phone. If the screen was bigger and the qwerty easier to work with I prolly would have kept it. But I'm pretty sure I made the right decision.
I do have to admit I miss Sense just a little.